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Question

When compared with the RBCs in humans, the erythrocytes in frogs are:
I. enucleated
II. nucleated
III. contain haemoglobin

A
Only I is correct
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B
Only II is correct
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C
Both I and III are correct
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D
Both II and III are correct
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Solution

The correct option is D Both II and III are correct
In case of humans, the erythrocytes or RBCs lack nucleus (enucleated) and other major cell organelles to provide more space for haemoglobin to bind with oxygen. Whereas in the case of frogs, the RBCs have both nucleus (nucleated) and haemoglobin. They need less oxygen to survive unlike humans, who require comparitively higher concentration of oxygen for their living.

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